Reporter Ben Terris told INSIDE EDITION that one of Trump's former opponents said he was “a real hoot on the course - a lot of fun to play with, but he did not play exactly by the rules - played by his own rules.”

Trump, who owns some of the world's top golf courses, addressed the issue at a press conference, saying: “I win at golf. That I can tell you.”

He added to the Washington Post: "That's a terrible thing to say about people, especially me."

He also announced on Thursday that he will not seek a third-party bid if he doesn’t win the Republican nomination.

Trump is still leading the Republican race - a new national poll puts him at 30 percent, with Dr. Ben Carson at 18 percent, and Jeb Bush a distant third at eight percent.

Trump has a new nemesis - basketball legend Kareem Abdul-Jabbar, who just wrote a blistering Washington Post essay, accusing the billionaire of "bullying tactics" and calling him "an enemy of the constitution."